JP2014040801A - Intake system of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake system of an internal combustion engine, in which a plurality of gas passages are downsized to improve mountability, and which is capable of introducing a plurality of different gases into an intake manifold in parallel.SOLUTION: An intake system 100 of an internal combustion engine includes an intake manifold 1 having four intake passages 11 which distribute and supply intake gas containing blow-by gas and vaporization fuel gas to each cylinder of an engine 10, and a gas passage member 2 provided on an outer surface 1a of the intake manifold 1 and integrally having a first passage 21 for the blow-by gas and a second passage 22 for the vaporization fuel gas, which is different from the first passage 21.

Description

  The present invention relates to an intake device for an internal combustion engine.

  2. Description of the Related Art Conventionally, an intake device for an internal combustion engine including an intake manifold having a plurality of intake passages that distribute and supply intake air to each cylinder of the engine is known (see, for example, Patent Document 1).

  In Patent Document 1, a surge tank is formed therein, an intake manifold (intake manifold) having a plurality of intake passages for distributing and supplying intake air in the surge tank to each cylinder of the engine, and the intake manifold is provided with an intake manifold. One gas introduction pipe for introducing EGR (Exhaust Gas Recirculation) gas or blow-by gas into the interior from the outside of the manifold, and EGR gas or blow-by gas introduced through the gas introduction pipe so as to communicate with the gas introduction pipe An intake device for an internal combustion engine is disclosed that includes an independent small chamber as a passage that guides one of these to the central portion of the surge tank. That is, in Patent Document 1, one gas passage portion that guides EGR gas or blow-by gas to the surge tank of the intake manifold is constituted by one gas introduction pipe and one independent small chamber communicating with the one gas introduction pipe. Has been.

JP 2011-220299 A

  However, since the intake device for the internal combustion engine of Patent Document 1 has only one gas passage portion constituted by the gas introduction pipe and the independent small chamber, EGR gas or blow-by gas is provided via the gas passage portion. Only one of these gases can be led to the surge tank of the intake manifold (intake manifold), and both EGR gas and blowby gas cannot be led to the surge tank of the intake manifold in parallel.

  Therefore, in the conventional intake apparatus for an internal combustion engine as described in Patent Document 1, a gas introduction pipe and a gas introduction pipe are provided so that a plurality of different gases can be guided in parallel to a surge tank of an intake manifold (intake manifold). It is conceivable to add another (one set) gas passage portion composed of independent small rooms.

  However, in the conventional intake device for an internal combustion engine as described in Patent Document 1, when a plurality of gas passage portions each including a gas introduction pipe and an independent small chamber are provided for each different gas, a plurality of gas passages are provided. The whole gas passage part consisting of the part is enlarged. For this reason, the arrangement space of the gas passage portion becomes large and easily interferes with peripheral parts of the intake manifold (intake manifold). As a result, there is a problem in that the mountability of the intake device of the internal combustion engine is lowered.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a plurality of gas passages in the intake manifold while reducing the number of gas passages and improving the mounting performance. It is an object to provide an intake device for an internal combustion engine capable of guiding different gases in parallel.

  To achieve the above object, an intake device for an internal combustion engine according to one aspect of the present invention includes an intake manifold having a plurality of intake passages that distribute and supply intake air including a first gas and a second gas to each cylinder of the engine. And a gas passage member provided on the outer surface of the intake manifold, in which a first passage for the first gas and a second passage for the second gas different from the first passage are integrated.

  In the intake device for an internal combustion engine according to one aspect of the present invention, as described above, the first passage for the first gas and the second passage for the second gas different from the first passage are formed on the outer surface of the intake manifold. By providing the integrated gas passage member, the first gas and the second gas that are different from each other in parallel through the first passage and the second passage different from the first passage of the gas passage member are arranged in parallel in the intake manifold. Can be guided. Further, by providing a gas passage member in which the first passage for the first gas and the second passage for the second gas different from the first passage are provided, the common (one) gas passage member is provided with the first passage. Since both the first passage and the second passage are provided, the gas passage member having two gas passages (the first passage and the second passage) can be made compact (downsized). Thereby, since it can suppress that the arrangement space of the gas passage member which has two gas passages becomes large, it is hard to produce interference with peripheral components. As a result, a plurality of different gas passages can be guided in parallel to the inside of the intake manifold by the first passage and the second passage while improving the mountability of the intake device of the internal combustion engine by reducing the plurality of gas passage portions. .

  In the intake device for an internal combustion engine according to the aforementioned aspect, preferably, the gas passage member divides the internal space of the gas passage member so that the first passage and the second passage are formed independently of each other. including. If comprised in this way, since the internal space of a gas channel member can be easily divided into the 1st channel for the 1st gas, and the 2nd channel for the 2nd gas by the partition part, it can be easily shared. By the (one) gas passage member, the first gas and the second gas can be guided in parallel to the inside of the intake manifold in a state of being separated from each other. In addition, the first gas and the second gas are mixed in the internal space of the gas passage member by introducing the first gas and the second gas to the intake manifold in a state of being separated from each other in the internal space of the gas passage member. In contrast, the first gas and the second gas collide with each other before entering the intake manifold, so that it is difficult to guide the first gas and the second gas into the intake manifold in a balanced manner. can do.

  In the intake device for an internal combustion engine according to the above aspect, the gas passage member preferably includes a second gas introduction port that is provided so as to communicate with the second passage and introduces the second gas from the outside into the second passage. . If comprised in this way, 2nd gas can be easily guide | induced to the 2nd channel | path from the exterior of a gas channel member by the 2nd gas introduction port.

  In the intake device for an internal combustion engine according to the above aspect, the intake manifold is preferably provided so as to guide the first gas and the second gas introduced into the intake manifold through the gas passage member to the plurality of intake passages. And includes a tournament passage that branches hierarchically toward the downstream side. If comprised in this way, since it becomes easy to disperse | distribute 1st gas and 2nd gas equally to a some intake passage by a tournament passage, the dispersibility of the gas to each cylinder can be improved. As a result, it is possible to suppress variation in the air-fuel ratio among a plurality of cylinders, and as a result, it is possible to suppress a reduction in exhaust gas purification due to variations in the air-fuel ratio among the cylinders. . Note that, when the first gas and the second gas are distributed to a plurality of intake passages using the tournament passages, a plurality of the first and second gases are introduced into the surge tank by a simulation performed by the inventor of the present application. It has been confirmed that the first gas and the second gas can be evenly dispersed by the plurality of intake passages as compared with the case where the first gas and the second gas are dispersed in the intake passages.

  In this case, the intake manifold is preferably provided at a position corresponding to each of the plurality of intake passages of the tournament passage, and includes a plurality of intake passage connection holes that respectively connect the tournament passage and the plurality of intake passages. If comprised in this way, the 1st gas and 2nd gas disperse | distributed substantially uniformly in the tournament channel | path by the intake channel | path connection hole can be guide | induced to each intake channel, and can be mixed with the intake air supplied to each cylinder.

  In the configuration in which the intake manifold includes a plurality of intake passage connection holes, preferably, the intake passage connection hole is a through hole penetrating from the tournament passage side to the inner peripheral side of the intake passage, and the inner periphery of the intake passage of the through hole The vicinity of the opening end on the side is formed so as to face the outlet side of the intake passage. According to this configuration, the first gas and the second gas can be guided in the direction toward the downstream side of the intake air flowing in the intake passage (the outlet side of the intake passage) by the intake passage connection hole. The first gas and the second gas can be smoothly mixed into the intake air without hindering the above. Further, when the first gas and the second gas are led in the direction toward the downstream side of the intake air, the suction force due to the negative pressure caused by the flow of the intake air in the intake passage works by the first gas and the second gas. Therefore, the first gas and the second gas are easily sucked into the intake passage from the intake passage connection hole, and as a result, the first gas and the second gas can be easily mixed into the intake air supplied to each cylinder. Can do.

  In the configuration in which the intake manifold includes a tournament passage, the intake manifold preferably includes a plurality of wall portions protruding inward from the inner surface of the intake manifold, and the tournament passage is integrated with the inner surface of the intake manifold by the plurality of wall portions. Is formed. If configured in this way, the tournament passage can be formed by utilizing the inner surface of the intake manifold, so unlike the case where the tournament passage is formed by a separate member from the intake manifold, without increasing the number of parts, A tournament passage can be easily formed in the intake manifold.

  In the configuration in which the intake manifold includes a tournament passage, preferably, the intake manifold integrally includes a connection passage for guiding the first gas and the second gas that have passed through the gas passage member to the tournament passage. According to this structure, the first gas and the second gas are easily guided from the gas passage member to the tournament passage of the intake manifold without increasing the number of parts by the connection passage integrally provided in the intake manifold. be able to.

  In the intake device for an internal combustion engine according to the aforementioned aspect, preferably, the intake manifold integrally includes a first gas introduction passage for guiding the first gas to the first passage of the gas passage member. If comprised in this way, 1st gas can be easily guide | induced to the 1st channel | path of a gas channel member by the 1st gas introduction channel | path integrally provided in the intake manifold, without increasing a number of parts. .

  In the intake device for an internal combustion engine according to the above aspect, the intake manifold and the gas passage member are preferably formed of resin and integrally joined to each other. If comprised in this way, a gas channel member can be easily joined to the outer surface of an intake manifold easily using a vibration welding construction method, a DSI (Die Slide Injection) construction method, etc. Further, by forming both the intake manifold and the gas passage member with resin, it is possible to reduce the weight of the intake device of the internal combustion engine.

  In the intake device for an internal combustion engine according to the above aspect, preferably, the first gas and the second gas are blow-by gas, evaporated fuel gas generated in the fuel tank, and recirculated exhaust gas. Two different gases selected from among them. With this configuration, two different gas selected from the three gases of blow-by gas, evaporated fuel gas, and exhaust gas are supplied to the intake manifold while improving the mountability by reducing the plurality of gas passage portions. Can be guided in parallel.

  According to the present invention, as described above, it is possible to guide a plurality of different gases in parallel to the inside of the intake manifold while improving the mountability by reducing the plurality of gas passage portions.

It is the schematic which showed the arrangement position of the intake device of the internal combustion engine by 1st and 2nd embodiment of this invention. It is the perspective view which showed the structure of the intake device of the internal combustion engine by 1st Embodiment of this invention. 1 is an exploded perspective view showing a configuration of an intake device for an internal combustion engine according to a first embodiment of the present invention. It is the figure which looked at the intake device of the internal combustion engine by 1st Embodiment of this invention from the cylinder head side (X1 direction side). It is the figure which looked at the intake device of the internal combustion engine by a 1st embodiment of the present invention from the throttle valve side (X2 direction side). It is sectional drawing which showed the intake passage connection hole of the intake device of the internal combustion engine by 1st Embodiment of this invention. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing which showed the blowby gas introduction channel | path of the intake device of the internal combustion engine by 1st Embodiment of this invention. It is the perspective view which showed the inside of the gas passage member of the intake device of the internal combustion engine by 1st Embodiment of this invention. It is the perspective view which showed the structure of the intake device of the internal combustion engine by 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
With reference to FIGS. 1-9, the structure of the intake device 100 of the internal combustion engine by 1st Embodiment of this invention is demonstrated.

  An intake device 100 for an internal combustion engine according to the first embodiment of the present invention is an intake device for a four-cylinder engine 10 for an automobile as shown in FIG. The intake device 100 is configured such that intake air that reaches through the air cleaner 20 and the throttle valve 30 flows in. The intake device 100 is provided on the upstream side of the cylinder head 10 a of the engine 10 and is configured to guide intake air to each cylinder of the engine 10. A head cover 10b is provided above the cylinder head 10a of the engine 10, and a crankcase 10c is provided below the cylinder head 10a. An exhaust manifold (exhaust manifold) 40 is provided on the downstream side of the cylinder head 10a.

  In the configuration of the first embodiment, the intake device 100 is configured such that blow-by gas (PCV (Positive Crankcase Ventilation) gas) leaked from the combustion chamber of the engine 10 to the crankcase 10c is returned from the crankcase 10c. Has been. Further, the intake device 100 is configured to be supplied with evaporated fuel gas (fuel purge gas) generated in the fuel tank 50 via the charcoal canister 60. The intake device 100 is configured to introduce blow-by gas and evaporated fuel gas into the intake air and guide them to each cylinder. The blow-by gas (PCV gas) is an example of the “first gas” in the present invention, and the evaporated fuel gas (fuel purge gas) is an example of the “second gas” in the present invention. Hereinafter, a detailed configuration of the intake device 100 for an internal combustion engine according to the first embodiment of the present invention will be described.

  As shown in FIGS. 2 and 3, the intake device 100 is provided on an intake manifold (intake manifold) 1 and an outer surface 1 a of the intake manifold 1, and guides a blow-by gas and an evaporated fuel gas into the intake manifold 1. And a member 2. The intake manifold 1 and the gas passage member 2 are both made of a thermoplastic synthetic resin (for example, a nylon resin containing glass fibers), and are integrally joined to each other by vibration welding.

  As shown in FIG. 3 and FIG. 4, intake air including blowby gas and evaporated fuel gas is distributed and supplied to each cylinder of the four-cylinder engine 10 at the cylinder head 10 a side (X1 direction side) of the intake manifold 1. Four intake passages 11 are provided. Each of the four intake passages 11 is configured to be connected to an intake port (not shown) provided in the cylinder head 10a. Further, the four intake passages 11 are integrally provided in an upper portion of a surge tank 12 formed in the intake manifold 1, and are configured to distribute and supply intake air in the surge tank 12 to each cylinder. Yes. Further, a suction hole 13 communicating with the surge tank 12 is formed in a portion of the intake manifold 1 on the throttle valve 30 side (X2 direction side). The intake hole 13 is configured to guide intake air supplied via the air cleaner 20 and the throttle valve 30 to the surge tank 12.

  Here, in the first embodiment, as shown in FIGS. 2 and 3, the intake manifold 1 includes a downstream member 3 provided on the cylinder head 10a side (X1 direction side) and a throttle valve 30 side (X2 direction side). ) And the upstream side member 4. The intake manifold 1 is formed by integrally joining the downstream member 3 and the upstream member 4 to each other by vibration welding. As shown in FIGS. 3 and 4, attachment holes 31 are provided at both ends of the downstream member 3 in the direction in which the four intake passages 11 are arranged (Y direction). Further, three attachment holes 32 are formed between the four intake passages 11 of the downstream member 3. The intake manifold 1 is fixed to the cylinder head 10a (see FIG. 1) by five fastening members (not shown) inserted into the two attachment holes 31 and the three attachment holes 32.

  Further, as shown in FIG. 3, a joining portion 15 for joining the gas passage member 2 is provided on the outer surface 1a of the upstream member 4 (intake manifold 1). The joint portion 15 is formed in a shape corresponding to the outer peripheral shape of the gas passage member 2. A connection passage 16 having a substantially rectangular cross section is formed integrally with the upstream member 4 of the intake manifold 1 at the end in the Y1 direction of the region surrounded by the joint portion 15. The connection passage 16 is configured to guide the blow-by gas and the evaporated fuel gas that have passed through the gas passage member 2 to a tournament passage 17 described later provided in the intake manifold 1.

  As shown in FIGS. 2 to 5, in the intake manifold 1, the blow-by gas and the evaporated fuel gas introduced into the intake manifold 1 through the gas passage member 2 and the connection passage 16 are supplied to the four intake passages 11. It includes a tournament passage 17 for branching and guiding. The tournament passage 17 is configured to branch the blow-by gas and the evaporated fuel gas hierarchically toward the downstream side. That is, the blow-by gas and the evaporated fuel gas introduced through one connection passage 16 provided on the upstream side are first branched into two toward the downstream side by the tournament passage 17, and then four further. And is led to a position corresponding to each of the four intake passages 11.

  Further, as shown in FIGS. 3 and 4, the downstream side member 3 of the intake manifold 1 includes four intake passage connection holes 171 provided at positions corresponding to the four intake passages 11 of the tournament passage 17. It is out. The four intake passage connection holes 171 are provided at four downstream ends of the tournament passage 17, respectively. Further, the four intake passage connection holes 171 are arranged at substantially the same distance from the connection passage 16. Specifically, the connection passage 16 is formed in the upstream portion 172 of the tournament passage 17 and is disposed at the approximate center in the Y direction of the tournament passage 17. The four intake passage connection holes 171 are formed so as to connect the four downstream end portions of the tournament passage 17 and the four intake passages 11, respectively. Specifically, as shown in FIG. 6, the intake passage connection hole 171 is a through-hole penetrating from the tournament passage 17 side to the inner peripheral side of the intake passage 11, and an open end located on the inner peripheral side of the intake passage 11 It is formed in a straight line inclined in the intake flow direction (X1 direction) so that 171a faces the outlet side (X1 direction side) of the intake passage 11. As shown in FIGS. 4 and 6, the open end 171 a of the intake passage connection hole 171 projects into the intake passage 11. As shown in FIGS. 3 and 6, the opening end 171 b of the intake passage connection hole 171 on the tournament passage 17 side is provided on an inclined surface perpendicular to the direction in which the intake passage connection hole 171 extends.

  Further, as shown in FIGS. 3 and 7, the downstream side member 3 of the intake manifold 1 is formed integrally with the inner surface 3 a of the downstream side member 3 and protrudes inward from the inner surface 3 a of the downstream side member 3. A rib-shaped wall 33 is provided. The upstream member 4 of the intake manifold 1 is formed integrally with the inner surface 4 a of the upstream member 4 and protrudes inward from the inner surface 4 a of the upstream member 4 so as to correspond to the wall portion 33 of the downstream member 3. And a plurality of rib-like wall portions 41 (see FIG. 7). The wall 33 of the downstream member 3 and the wall 41 of the upstream member 4 are configured to be joined to each other by vibration welding. The tournament passage 17 is constituted by a space (passage) formed by the wall portion 33 of the downstream member 3 and the wall portion 41 of the upstream member 4. That is, the tournament passage 17 is integrally formed on the inner surface 3a (4a) of the intake manifold 1 by the plurality of rib-shaped walls 33 (41) of the intake manifold 1.

  Further, as shown in FIG. 7, the upstream portion 172 corresponding to the connection passage 16 of the tournament passage 17 has a passage cross-sectional area larger than the opening cross-sectional area A1 (see FIGS. 4 and 5) of the substantially rectangular connection passage 16. A2 (opening cross-sectional area A2 in a direction orthogonal to the opening cross-sectional area A1 of the connection passage 16). As a result, the blowby gas and the evaporated fuel gas that have passed through the connection passage 16 can be mixed with each other in a larger space, and therefore can be mixed more uniformly than when mixed in a smaller space.

  Further, as shown in FIGS. 4 and 5, the intake manifold 1 integrally includes a blow-by gas introduction passage 18 for guiding blow-by gas to a first passage 21 described later of the gas passage member 2. Specifically, as shown in FIGS. 3 and 8, the downstream member 3 of the intake manifold 1 has a rib-like wall portion 34 protruding inward from the inner surface 3 a of the downstream member 3. It is formed integrally with the inner surface 3a. The wall portion 34 is formed so as to protrude in a rectangular circumferential shape so as to constitute a passage portion 18a having a rectangular cross section. Further, the upstream member 4 of the intake manifold 1 has a rib-like wall protruding inward from the inner surface 4a of the upstream member 4 so as to correspond to the wall portion 34 of the downstream member 3, as shown in FIG. The part 42 is formed integrally with the inner surface 4 a of the upstream member 4. Similarly to the wall portion 34, the wall portion 42 is formed so as to protrude in a rectangular circumferential shape so as to constitute a passage portion 18b having a rectangular cross section. The wall 34 of the downstream member 3 and the wall 42 of the upstream member 4 are configured to be joined to each other by vibration welding. The blow-by gas introduction passage 18 having a rectangular cross section is formed by the passage portion 18 a of the wall portion 34 of the downstream member 3 and the passage portion 18 b of the wall portion 42 of the upstream member 4. The blow-by gas introduction passage 18 is formed so as to penetrate the inside of the intake manifold 1 in the X direction. A PCV (Positive Crankcase Ventilation) valve (not shown) is attached to the end 181 on the X1 direction side of the blow-by gas introduction passage 18. The blow-by gas introduction passage 18 is an example of the “first gas introduction passage” in the present invention.

  As shown in FIG. 3, the gas passage member 2 is integrally joined to the joint portion 15 of the upstream side member 4 of the intake manifold 1 by vibration welding, and the connection passage 16 and the blow-by gas introduction passage 18 are connected in the X2 direction. It is arranged at a position covering from the side. Further, as shown in FIGS. 2, 3, 5, and 9, the gas passage member 2 includes a first passage 21 for blow-by gas and a second passage 22 for evaporated fuel gas different from the first passage 21. And are integrated. Specifically, the gas passage member 2 has a partition portion 23 that divides the internal space of the gas passage member 2, and the first passage 21 and the second passage 22 are separated from each other by the partition portion 23. Yes. That is, the first passage 21 and the second passage 22 are formed in an independent state by the partition portion 23.

  As shown in FIG. 9, the first passage 21 for blow-by gas is formed in a substantially S-shape as a whole, and takes in the gas introduction part 21a, the intermediate part 21b, and the blow-by gas into which the blow-by gas is introduced. A gas discharge portion 21c for discharging to the manifold 1 is included. The gas introduction part 21a is configured to be disposed at a position corresponding to the blow-by gas introduction passage 18 (see FIG. 5). The gas discharge part 21c is comprised so that it may be arrange | positioned in the position corresponding to the connection channel | path 16 (refer FIG. 5). The intermediate portion 21b is disposed between the gas introduction portion 21a and the gas discharge portion 21c, and is configured to connect the gas introduction portion 21a and the gas discharge portion 21c to each other. The first passage 21 is formed so that the passage cross-sectional area is larger than the gas introduction part 21a in the intermediate part 21b and smaller than the intermediate part 21b in the gas discharge part 21c.

  The second passage 22 for the evaporated fuel gas is formed so as to extend in the Y direction as a whole, and is disposed on the upper side of the first passage 21 with the partition portion 23 interposed therebetween. The second passage 22 includes a gas introduction part 22 a into which the evaporated fuel gas is introduced and a gas discharge part 22 b that discharges the evaporated fuel gas to the intake manifold 1. The gas inlet 22a is configured to be provided with an evaporative fuel gas inlet 24 described later. The gas discharge part 22b is comprised so that it may be arrange | positioned in the position corresponding to the connection channel | path 16 (refer FIG. 5). The second passage 22 is formed so that the passage cross-sectional area is smaller than the gas introduction portion 22a in the gas discharge portion 22b.

  As shown in FIG. 9, the partition portion 23 is formed in a flat plate shape, and is integrally formed on the inner surface 2 a so as to protrude inward (X1 direction side) from the inner surface 2 a of the gas passage member 2. . Further, as shown in FIGS. 5 and 7, the partition portion 23 includes a gas discharge portion 21 c of the first passage 21 and a gas discharge portion 22 b of the second passage 22 at the end in the Y1 direction corresponding to the connection passage 16. The internal space of the gas passage member 2 is divided so that the cross-sectional areas of the passages have substantially the same size.

  As shown in FIGS. 2 to 5, the gas passage member 2 has a tubular evaporated fuel gas inlet 24 that communicates with the second passage 22 for the evaporated fuel gas. The evaporated fuel gas inlet 24 is an example of the “second gas inlet” in the present invention. The evaporated fuel gas inlet 24 is connected to the gas inlet 22 a of the second passage 22. Further, the evaporated fuel gas inlet 24 is configured to introduce the evaporated fuel gas into the second passage 22 from the outside of the intake device 100. Specifically, the evaporated fuel gas inlet 24 is connected to a charcoal canister 60 (see FIG. 1) through a pipe (not shown) and is generated in a fuel tank 50 (see FIG. 1) supplied via the charcoal canister 60. It has a function of guiding the evaporated fuel gas to the gas introduction part 22 a of the second passage 22. The evaporated fuel gas inlet 24 is formed so as to extend in the same direction as the direction (Y direction) in which the second passage 22 extends. As a result, the gas flowing through the evaporated fuel gas inlet 24 flows smoothly through the second passage 22 as it is.

  As shown in FIG. 5, the gas passage member 2 is configured so that the blow-by gas that has passed through the blow-by gas introduction passage 18 is transferred to the upstream portion 172 of the tournament passage 17 through the connection passage 16 by the first passage 21 as shown in FIG. The vaporized fuel gas that has reached the vaporized fuel gas inlet 24 can be introduced into the upstream portion 172 of the tournament passage 17 via the connection passage 16 in a state separated from the blow-by gas by the second passage 22. Is possible.

  In the first embodiment, as described above, the first passage 21 for blow-by gas and the second passage 22 for evaporated fuel gas different from the first passage 21 are integrated with the outer surface 1a of the intake manifold 1. By providing the gas passage member 2, different blowby gas and evaporated fuel gas are introduced into the intake manifold 1 through the first passage 21 and the second passage 22 different from the first passage 21 of the gas passage member 2. Can be guided in parallel. Further, by providing the gas passage member 2 in which the first passage 21 for blow-by gas and the second passage 22 for the evaporated fuel gas different from the first passage 21 are provided, a common (one) gas passage is provided. Since both the first passage 21 and the second passage 22 are provided in the member 2, the gas passage member 2 having two gas passages (the first passage 21 and the second passage 22) can be made compact (downsized). it can. Thereby, since it can suppress that the arrangement space of the gas passage member 2 which has two gas passages becomes large, it is hard to produce interference with peripheral components. As a result, the plurality of gas passage portions (the first passage 21 and the second passage 22) are made compact to improve the mountability of the intake device 100 of the internal combustion engine, and the intake manifold 1 is provided by the first passage 21 and the second passage 22. A plurality of different gases (blow-by gas and evaporated fuel gas) can be led in parallel.

  Further, in the first embodiment, as described above, the internal space of the gas passage member 2 is divided so that the first passage 21 and the second passage 22 are formed in the gas passage member 2 in an independent state. A partition 23 is provided. Thereby, since the internal space of the gas passage member 2 can be easily divided into the first passage 21 for blow-by gas and the second passage 22 for the evaporated fuel gas by the partition portion 23, The (one) gas passage member 2 can guide the blow-by gas and the evaporated fuel gas in parallel to the inside of the intake manifold 1 while being separated from each other. In addition, when the blowby gas and the evaporated fuel gas are guided to the intake manifold 1 in a state where they are separated from each other in the internal space of the gas passage member 2, the blowby gas and the evaporated fuel gas are mixed in the internal space of the gas passage member 2. Unlike the case where the blow-by gas and the evaporated fuel gas collide before entering the intake manifold 1, it becomes difficult to guide the blow-by gas and the evaporated fuel gas into the intake manifold 1 in a balanced manner. Can be suppressed.

  In the first embodiment, as described above, the gas passage member 2 is provided with the evaporated fuel gas introduction port 24 for introducing the evaporated fuel gas from the outside into the second passage 22 so as to communicate with the second passage 22. . Thereby, the evaporated fuel gas can be easily guided to the second passage 22 from the outside of the gas passage member 2 by the evaporated fuel gas inlet 24.

  Further, in the first embodiment, as described above, the blow-by gas and the evaporated fuel gas introduced into the intake manifold 1 through the gas passage member 2 are directed to the downstream side so as to be guided to the four intake passages 11. Thus, a tournament passage 17 that branches hierarchically is provided in the intake manifold 1. As a result, the tournament passage 17 makes it easy to evenly distribute the blow-by gas and the evaporated fuel gas to each of the four intake passages 11, so that the air-fuel ratio can be suppressed from varying among the four cylinders. Further, it is possible to suppress the exhaust gas purification performance from being deteriorated due to the variation in the air-fuel ratio between the cylinders.

  In the first embodiment, as described above, the four intake passage connection holes for connecting the tournament passage 17 and the four intake passages 11 at positions corresponding to the four intake passages 11 of the tournament passage 17, respectively. 171 is provided. As a result, the blow-by gas and the evaporated fuel gas that are substantially evenly distributed in the tournament passage 17 can be guided to the intake passages 11 and mixed into the intake air supplied to the cylinders by the intake passage connection holes 171.

  In the first embodiment, as described above, the intake passage connection hole 171 is formed so that the opening end 171a on the inner peripheral side of the intake passage 11 faces the outlet side (X1 direction side) of the intake passage 11. As a result, the intake passage connecting hole 171 can guide the blow-by gas and the evaporated fuel gas in the direction toward the downstream side of the intake air flowing through the intake passage 11 (the outlet side of the intake passage 11). Without this, the blow-by gas and the evaporated fuel gas can be smoothly mixed with the intake air. Further, the blow-by gas and the evaporated fuel gas are guided in the direction toward the downstream side of the intake air, so that the suction force due to the negative pressure caused by the flow of the intake air in the intake passage 11 is more likely to work on the blow-by gas and the evaporated fuel gas. Therefore, the blow-by gas and the evaporated fuel gas are easily sucked into the intake passage 11 from the intake passage connection hole 171. As a result, the blow-by gas and the evaporated fuel gas can be easily mixed into the intake air supplied to each cylinder. it can.

  In the first embodiment, as described above, the intake manifold 1 is provided with the plurality of wall portions 33 (41) protruding inward from the inner surface 3a (4a) of the intake manifold 1, and the plurality of wall portions 33 (41) are provided. ), The tournament passage 17 is integrally formed on the inner surface 3a (4a) of the intake manifold 1. As a result, the tournament passage 17 can be formed by using the inner surface 3a (4a) of the intake manifold 1, so that the number of parts is increased, unlike the case where the tournament passage 17 is formed by a separate member from the intake manifold 1. Therefore, the tournament passage 17 can be easily formed in the intake manifold 1.

  In the first embodiment, as described above, the connection passage 16 for guiding the blowby gas and the evaporated fuel gas that have passed through the gas passage member 2 to the tournament passage 17 is integrally provided in the intake manifold 1. Accordingly, the blow-by gas and the evaporated fuel gas are easily guided from the gas passage member 2 to the tournament passage 17 of the intake manifold 1 by the connection passage 16 integrally provided in the intake manifold 1 without increasing the number of parts. be able to.

  In the first embodiment, as described above, the blow-by gas introduction passage 18 for guiding the blow-by gas to the first passage 21 of the gas passage member 2 is integrally provided in the intake manifold 1. Thereby, the blow-by gas can be easily guided to the first passage 21 of the gas passage member 2 by the blow-by gas introduction passage 18 integrally provided in the intake manifold 1 without increasing the number of parts.

  In the first embodiment, as described above, the intake manifold 1 and the gas passage member 2 are formed of synthetic resin and integrally joined to each other by vibration welding. Thereby, the gas passage member 2 can be easily joined integrally to the outer surface 1a of the intake manifold 1, and both the intake manifold 1 and the gas passage member 2 are formed of resin, so that the intake air of the internal combustion engine can be obtained. The weight of the device 100 can be reduced.

(Second Embodiment)
Next, an internal combustion engine intake device 200 according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, unlike the first embodiment in which blow-by gas is introduced into the first passage 21 of the gas passage member 2 through the blow-by gas introduction passage 18, the blow-by gas introduction port provided in the gas passage member 202 is used. A configuration in which blow-by gas is introduced into the first passage 21 of the gas passage member 202 via 221 will be described.

  As shown in FIG. 10, an intake device 200 for an internal combustion engine according to the second embodiment of the present invention is provided on an intake manifold (intake manifold) 201 and an outer surface 201 a of the intake manifold 201, and intakes blow-by gas and evaporated fuel gas. And a gas passage member 202 that leads to the inside of the manifold 201. Unlike the first embodiment, the intake manifold 201 does not have the blow-by gas introduction passage 18 (see FIG. 3). The gas passage member 202 has a circular blow-by gas inlet 221 communicating with the first passage 21 for blow-by gas. The blow-by gas introduction port 221 is configured to introduce blow-by gas into the first passage 21 from the outside of the intake device 200. Specifically, the blow-by gas inlet 221 is connected to the crankcase 10c (see FIG. 1) by a pipe (not shown), and is configured to guide the blow-by gas in the crankcase 10c to the first passage 21. The blow-by gas introduction port 221 is formed so as to extend in the X direction, and is provided integrally with an end portion of the gas passage member 202 in the Y2 direction.

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  In the second embodiment, as described above, the gas passage member 202 is provided with the circular blow-by gas inlet 221 that communicates with the first passage 21 for blow-by gas, so that the blow-by as in the first embodiment is performed. Since it is not necessary to provide the gas introduction passage 18 (see FIG. 3) inside the intake manifold 201, it is possible to prevent the internal structure of the intake manifold 201 from becoming complicated.

  Also in the configuration of the second embodiment, as in the first embodiment, the second passage for evaporated fuel gas, which is different from the first passage 21 for blow-by gas and the first passage 21, is formed on the outer surface 201 a of the intake manifold 201. By providing the gas passage member 202 integrated with the passage 22, the plurality of gas passage portions (the first passage 21 and the second passage 22) can be made compact and the mountability of the intake device 200 of the internal combustion engine can be improved. A plurality of different gases (blow-by gas and evaporated fuel gas) can be led into the intake manifold 201 in parallel.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the intake device for an internal combustion engine of the present invention is applied to an automobile engine is shown, but the present invention is not limited to this. The intake device for an internal combustion engine of the present invention may be applied to an engine other than an automobile engine.

  In the first and second embodiments, the blow-by gas and the evaporated fuel gas are shown as examples of the first gas and the second gas of the present invention. However, the present invention is not limited to this. In the present invention, the first gas and the second gas are two different gases selected from three gases of blow-by gas, evaporated fuel gas, and exhaust gas to be recirculated (EGR (Exhaust Gas Recirculation) gas). Any combination other than the combination in which the first gas is blow-by gas and the second gas is evaporated fuel gas may be used.

  In the first and second embodiments, an example in which four intake passages are provided in the intake manifold so as to correspond to a four-cylinder engine is shown, but the present invention is not limited to this. In the present invention, a plurality of intake passages other than four may be provided in the intake manifold as long as the number corresponds to the number of cylinders of the engine.

  In the first and second embodiments, the intake passage connection hole is inclined in the intake flow direction (X1 direction) so that the opening end located on the inner peripheral side of the intake passage faces the outlet side of the intake passage. Although the example which forms in linear form was shown, this invention is not limited to this. In the present invention, if the vicinity of the opening end of the intake passage connection hole is formed so as to face the outlet side of the intake passage, the intake passage connection hole may be formed in a curved shape or a bent shape instead of a straight shape. Good.

  In the first and second embodiments, the example in which the intake manifold and the gas passage member are integrally joined to each other by vibration welding has been described. However, the present invention is not limited to this. In the present invention, if the intake manifold and the gas passage member are integrally joined to each other, for example, the intake manifold and the gas passage member are integrated with each other by a method other than vibration welding, such as DSI (Die Slide Injection) method. You may join. Similarly, the downstream side member and the upstream side member of the intake manifold may be integrally joined to each other by a method other than vibration welding.

  In the first and second embodiments, as an example of the gas passage member of the present invention, a gas passage member in which two passages, a first passage for blow-by gas and a second passage for evaporated fuel gas, are integrated. However, the present invention is not limited to this. In the present invention, in addition to the first passage and the second passage, a gas passage member in which a third passage for the third gas is integrated may be used. That is, a gas passage member in which three or more passages for different gases (such as blow-by gas, evaporated fuel gas, and recirculated exhaust gas) are integrated may be used.

1 intake manifold 2 gas passage member 10 engine 11 intake passage 16 connection passage 17 tournament passage 18 blow-by gas introduction passage (first gas introduction passage)
21 1st channel | path 22 2nd channel | path 23 Partition part 24 Evaporated fuel gas inlet (2nd gas inlet)
33, 41 Wall portion 100, 200 Intake device for internal combustion engine 171 Intake passage connection hole

Claims (11)

An intake manifold having a plurality of intake passages for distributing and supplying intake air including the first gas and the second gas to each cylinder of the engine;
An internal combustion engine comprising: a gas passage member provided on an outer surface of the intake manifold, wherein the first passage for the first gas and the second passage for the second gas different from the first passage are integrated. Inhalation device.   2. The internal combustion engine according to claim 1, wherein the gas passage member includes a partition portion that divides an internal space of the gas passage member so that the first passage and the second passage are formed in an independent state. Inhalation device.   3. The internal combustion engine according to claim 1, wherein the gas passage member is provided so as to communicate with the second passage and includes a second gas introduction port for introducing the second gas into the second passage from the outside. Inhalation device.   The intake manifold is provided so as to guide the first gas and the second gas introduced into the intake manifold through the gas passage member to the plurality of intake passages, and is hierarchically arranged toward the downstream side. The intake device for an internal combustion engine according to any one of claims 1 to 3, further comprising a tournament passage that branches into a straight line.   5. The intake manifold includes a plurality of intake passage connection holes provided at positions corresponding to the plurality of intake passages of the tournament passage, and connecting the tournament passage and the plurality of intake passages, respectively. An intake device for an internal combustion engine according to claim 1.   The intake passage connection hole is a through hole that penetrates from the tournament passage side to the inner peripheral side of the intake passage, and the vicinity of the opening end of the through hole on the inner peripheral side of the intake passage is on the outlet side of the intake passage The intake device for an internal combustion engine according to claim 5, wherein the intake device is configured to face the engine. The intake manifold includes a plurality of walls protruding inward from the inner surface of the intake manifold,
The intake device for an internal combustion engine according to any one of claims 4 to 6, wherein the tournament passage is integrally formed on an inner surface of the intake manifold by the plurality of walls.   8. The intake manifold according to claim 4, wherein the intake manifold integrally includes a connection passage for guiding the first gas and the second gas that have passed through the gas passage member to the tournament passage. 9. An intake device for an internal combustion engine.   The internal combustion engine according to any one of claims 1 to 8, wherein the intake manifold integrally includes a first gas introduction passage for guiding the first gas to the first passage of the gas passage member. Intake device.   The intake device for an internal combustion engine according to any one of claims 1 to 9, wherein the intake manifold and the gas passage member are formed of resin and are integrally joined to each other.   The first gas and the second gas are two different gases selected from three gases: blow-by gas, evaporated fuel gas generated in a fuel tank, and exhaust gas to be recirculated. The intake device for an internal combustion engine according to any one of claims 1 to 10.

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